Pigeons can exhibit a checkered or plain colored pattern A b

Pigeons can exhibit a checkered or plain colored pattern. A bunch of controlled crosses were done and you got the following results You then took the offspring and did the following crosses What is the pattern of inheritance for the Checkered phenotype? What are the genotypes of the following: Cross E Check Cross G Check(a) Cross G Check(b)

Solution

Let us denote the gene allele for the checkered pattern to be C and gene allele for plain to be P. Note these are both different alleles for the same gene, we have named with two different capital letters, so as to avoid the confusion of dominance and recessive.

1. The pattern of inheritance for the checkered phenotype is dominant and follows Mendelian inheritance.

2. Genotypes of:

(i) Cross E Check: CP (Heterozygous)

(ii) Cross G Check (a): CC (Homozygous dominant)

(iii) Cross G check (b): CP (Heterozygous)